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  • Last Modified 15-09-2022

NCERT Solutions Class 12 Physics Chapter 11 The Dual Nature of Radiation and Matter

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NCERT Solutions Class 12 Physics Chapter 11 The Dual Nature of Radiation and Matter: In Chapter 11 of Class 12 Physics, students learn about the Dual Nature of Radiation and Matter. Students can understand concepts better by solving in-text exercises with the help of NCERT Solutions 12th Physics chapter 11.

The NCERT Solutions provided in this article have been prepared by subject experts at Embibe and are available for free to download. Students can follow the solutions to understand the correct approach to answer the in-text questions. Embibe also offers over 600 questions from over 55 books for free to help students prepare for their exams. Scroll down to learn more on chapter 11 Physics Class 12 NCERT Solutions.

NCERT Solutions Class 12 Physics Chapter 11: Important Topics

In this chapter, students learn about the Dual Nature of Radiation and Matter and the work function of a metal. The minimum energy required by an electron to come out of a metal surface is called the work function of the metal. Energy (greater than the work function (φο) required for emission of electrons from the metal surface can be supplied by suitably heating or applying a strong electric field or irradiating it with light of suitable frequency. 

Students can visit Embibe to get more important details on NCERT 12th Physics Chapter 11 for free. Before delving further into the details of this article, students can refer the table below to check all the important topics covered in this chapter:

Exercise NumberTopics
Ex 11.1Electron Emission
Ex 11.2Photoelectric Effect
Ex 11.3Einstein’s Equation of Photoelectric Effect
Ex 11.4Photoelectric Effect and Wave Theory of Light
Ex 11.5Particle Nature Of Light: The Photon
Ex 11.6Wave Nature Of Matter
Ex 11.7Davisson-Garner Experiment

NCERT Solutions Class 12 Physics Chapter 11: Points to Remember

We have provided some important points that are covered in NCERT Class 12 Physics Chapter 11 to help students in their exam preparations. Refer to the list below:

  • The minimum energy required by an electron to escape from the metal surface is called the work function of the metal.
  • One electron volt is the energy gained by an electron when it has been accelerated by a potential difference of 1 Volt, so that 1eV = 1.602 x 10−19 J.
  • There are three ways to provide energy to an electron so that it escapes the metal surface: Thermionic emission, Field emission, Photoelectric emission.
  • Some photosensitive substances emit electrons called photoelectrons when they are illuminated by light by a phenomenon called the photoelectric effect. A stream of photoelectrons is called photocurrent.
  • The minimum frequency of the incident photon for photoelectric effect to happen is called threshold frequency, and the energy of the photon at this frequency is equal to the work function of the metal.
  • According to Heisenberg’s uncertainty principle, it is not possible to measure both the position and momentum of a particle at the same time exactly. The uncertainty in position (Δx) and in momentum (ΔP) are related as ΔxΔP = h/2π.
  • Discovery of diffraction of electrons by C.J. Davisson and L.H. Germer lead to verification of the wave nature of electrons. In this experiment, electrons are bombarded on a metal which scatters them. The scattered electrons are collected by a collector and it is observed that the intensity of the scattered electrons is dependent on the subtle variations in the position of the collector, proving the phenomenon of diffraction in electrons.

Students can get more important points for NCERT Class 12 Physics Chapter 11 The Dual Nature of Radiation and Matter on Embibe for free!

NCERT Solutions for Class 12 Physics: All Chapters

The NCERT Solutions for Class 12 Physics for all chapters are given below for students’ reference:

FAQs

Q.1: Are the Class 12 Physics Chapter 11 NCERT solutions available for in PDF format?

Ans: All NCERT solutions provided by Embibe, including NCERT Class 11 Physics Chapter 12 solutions, are available in PDF format.

Q.2: What is the dual nature of light and matter? 

Ans: In 1905, Albert Einstein (1879-1955) developed a theory stating that light has a dual nature. Light acts not only as a wave but also as a particle. Each particle of light has a quantum of energy associated with it and is called a photon.

Q.3: From where can I download Class 12 Physics Chapter 11 Solutions PDF?

Ans: You can download Class 12 Physics Chapter 12 Solutions/Dual Nature of Radiation and Matter NCERT solutions from Embibe for free.

Q.4: What is the nature of radiation?

Ans: Radiation is a form of energy. There are two basic types of radiation. One is particulate radiation, which involves tiny, fast-moving particles that have both energy and mass. Particulate radiation is primarily produced by the disintegration of an unstable atom and includes Alpha and Beta particles.

Q.5: How many exercises are there in Class 12th Physics Chapter 11?

Ans: There are a total of 8 topics with sub-units in NCERT Solutions for Class 12 Physics Chapter 11.

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